Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong cac dot snippets" » "duong cac dot snippets", "dong bac dot snippets", "dung cac dot snippets", "dong cac don snippets", "dong cac cot snippets", "dong cac doi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong cac dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cac dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cac dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cac dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.